<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>2_类式组件</title>
  </head>
  <body>
    <!-- 准备号一个容器 -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom，用于支持react dom操作 -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <script type="text/babel">
      // 1. 创建类式组件
      class MyComponent extends React.Component {
        render() {
          return <h2>我是用类定义的组件（适用于复杂的组件）</h2>
        }
      }

      // 2. 渲染类组件到DOM
      ReactDom.render(<MyComponent />, document.getElementById('test'))
    </script>
  </body>
</html>
